package com.MusicWeb.servlet;

import com.MusicWeb.service.InformationService;
import com.google.gson.Gson;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.util.List;

@WebServlet("/comment")
//todo: 根据音乐id 查询评论
//http://localhost:8080/comment?i_id=
public class CommentServlet extends HttpServlet {
    InformationService informationService=new InformationService();
    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String id=req.getParameter("i_id");
//        String id="1";
        List result = informationService.Select(Integer.parseInt(id));
        if (result!=null) {
            // 设置返回的数据为json对象
            resp.setContentType("application/json;charset=utf-8");
            // 把实体转换为json，返回给前端
            String str = new Gson().toJson(result);
            resp.getWriter().print(str);
        }
    }
}
